Improvement



' IIIE'. sIofvEE. l MACHINE ECR CUTTING PRECIOUS STCNEE.

Patented Jn. 25,1876.;

NEJIIEECE.

FIG. 2.

Whit-#1:55555 tilforming part of Leim@ Patent No. massant@ Jennery 25,1876; applicati onfnla'* if Q." ,'Uiff, Y l

' omiten, 11375.

, To all' whom't'mcty concer/'11,:

The object of .my invention is t'o facilitate i the operation and makemore perfect the-.work

lof'cutting precious stones; and to enahle'others skilled inthe arttolmakeand use my inveutionl Willfgivea ,full and cleandescription ofits construction and opera-tion, reierencev being had tothe'accolnpa'nyingdrawings..

Figure lisa top'plan of my inachii1e,showing'headslplaced at an angle;Fig. 2, sarneas attachment for oscillating head in place; Fig. 3,sectional elevation, showing end view of one head, vwith oscillatingattachment; connectechw Figs. V 4, 5,6, and 7 are modified Ways of holdingand securing the sockets whichcontain the stones :to be cut. A

The arrangementiof this machine issuch that; anyvn'uniber of stones canbe operated onnsed'as a stop to-p'revent either of the heads D from'mofving,"when so desired..l On the shafts'- C. are secured pulleys,which may be' -used when the heads'Dere to make 4a coma.' pleterevolution, and alsofto make a connection with the standard E whenV theh'eadsD-'7 are toreinain stationary'. 0n' the head-steelt is 'alsoattached anLadjusting-screw, Fribylf which the lateral motion of the"shafts C may be- ,prevented j The'head-stocks l5l are so ar .l rangedthat they may be adjusted at anyr re? -f quired angle in ahorizontalplane vin relation l' to. the bed-plate A, and Vthe bed-plateAhas f 'slots in the direction of its length, fr )rthe'purry vpose ofallowingl thehead-stocks B to beset at, Fig. 1, withlheads in line` witheach other, and 7 the ri'ghtfdistance, apart," wliielif' distance 'varries with the angleof the heads. One of 'the4 headestocks B has an arm,G, attachedtoit,v

which carriesV a pulley,jH, and crank J. The crank J is connected withone ofthe heads'DMl. by means ot aconnecting-rod, H', when theat oneandthe Sametime, orthey can be acted on in single pairs. Tlleheads inwhich the stones are secured may be revolved each inde# pe'ndent of "theother, v'or both revolved lin opf The manner of "securing the stones tothe I.. heads is shown at Figsfet, 5, 6,and- 7; butfl -prcfer 4the wayshown at AEig.- 5. A ball, K, having a projection, L,',to .which thestone is I posite directions, bringing each stone-into con- 'tact with-iall 'the others or one of the heads may be oscillated by anyt suitablemeans, while the otheris-held stationary, thus bringing-the same-pairs'into frequeutconta'ct; The devices 4for holding the stones aresoconstructed that they may be held at any angle of rotation up toforty-live degrees Without readjusting the-` stouesand theheads maycontain any number of stones-fromone upward,depending only o n size' ofhead required. to receive them. ,v

The construction lof the machine is as fob' lows On a bed-plate, '-A,are 'placed tivo frames or headstocks, B, to` supportv the shafts G.These shafts C have each ot' them, onrtlie ends nearest to each other,ajliead, D, in Whichare secured the stones -to be operated-upon, in nunber'frorn,one-upward, according to the size of the head,- and the'stonesare held and adjusted tol any required angle in one of the-ways shown atFigs. 4, 5, 6, and 7 The head-stocks Bv have attached to them bearingsto receive the shafts G, and also astand'ard,E', which is secured inthe-ordinary way,"i s tted 'into a socket'or bearing, M,which allowsthe-hall to move in anyfdirectio'n. Behind the ball K, and in the tubeN, is a concave washer,(), lled to the surface of the bali, and'backv ofthis vvashe1{ ,O isa screw, P, fitting into the tube N for the. purposeof forcing lthe washer 0 onto the ball K, and holding 'the ball K in vany required Ipo sition. I The tube N is screwed or threadedover itswhole outer surface, and has tivo inuts f` R, one in each' side ofthehead D,Which pro-,-

'Avides ameans of adjusting thevstonesfto or,4

from-the heads'Din relation to each. other.:

- The other views, i4, 6, and '1., show other. cons 'structions on thesame principle,'i`or holding the stones in position; but they do notrequire special description, asthe drawings show the of Vthe balls K,and then the balls K are ad`I justcd tothe require'dangles. iftheballs,rlljiv not allow of ille required :ingle .theheed-stock,

may then he turned :1 -lso, and adjusted to theproperdistmlcb'eipart,and then secured. Vhe|i the machine` has'eeiso'adjusted the heads maybe pnt in motion in l-either xvay, ns'desired--tlmtis, making :t full revolution or an oscillation with hotliheads in operation, or

with 'oneof them held s'tz'ttionn-ry by means ofl the stop F.

f Thendvnntuges of this machine over others l are the ense:induccnracywith which the stelles -to he operated on may be adjusted inrelattionv to each other, es regards :ingle vanddstance apart; also,that any number of stones can be operated on ut saine time, dependingonly on size of the machine.l

rand described.

What I claim, and desirev to secure by Let. ters Patent, isf- 1. In auorganized machine f0.1` cutting precious stones, the'adjustablehead-stock B B, l

carrying the 'revolving or ,oscillating heads D D, constructed toreceive one or more pairs of stones to be operated upon, substantiallyasset forth;

` 2. ThefballlK, to which the Y'stones mese` cured, arranged', adjusted,and securedin the head or disk vD orthreaded tube N, as shown

